ZrC纳米粉体改性C/C-SiC复合材料的微观结构和烧蚀性能

doi:10.19976/j.cnki.43-1448/TF.2024027

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Abstract In order to improve the ablation resistance of C/C-SiC composites, ZrC nano-powder modified C/C-SiC composites were prepared by the reactive melt infiltration (RMI) with ZrC nano-powder and Si powder as raw materials. X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometer were used to investigate the effects of ZrC nano-powder contents on the microstructure and ablation properties of C/C-SiC composites. The results indicate that with the increase of ZrC nano-powder content, the porosity of the composite increases, but the density changes little. Meanwhile, part of ZrC nano-powders are diffusely distributed in the SiC matrix, and part of them are agglomerated. After ablation for 30 s, when the mole fraction of ZrC nano-powder is 6%, the composite exhibits the lowest mass and linear ablation rates of 2.0 mg/s and 3.9 μm/s, respectively. And with the increase of ZrC nano-powder content, the content of ZrO₂ formed during ablation increases, this leads to a notable enhancement in the pinning effect on SiO₂, effectively improving the ablation resistance of C/C-SiC composites.

Key words： C/C-SiC composite ZrC nano-powder reactive melt infiltration microstructure ablation property

Received: 25 March 2024 Published: 12 August 2024

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	TANG Lei
	BAI Kailun
	XIONG Xiang
	YIN Jian
	ZHANG Hongbo
	ZUO Jinlü

Cite this article:

TANG Lei,BAI Kailun,XIONG Xiang, et al. Microstructure and ablation properties of ZrC nano-powder modified C/C-SiC composites[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(3): 191-200.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024027 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I3/191

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